here is some background for those of you who want to know a little more about Hellsing:
The basic concept of the series concerns a secret British government organization called Hellsing. This organization was formed several hundred years ago by either Abraham van Helsing or his descendants to fight vampires across Britain. As the first episode opens, a vampire is ravaging the English village of Cheddar. Integra Hellsing tells the police to stand down, as the first few squads have already been killed by the vampire and become ghouls (in Hellsing, ghouls are similar to zombies under a vampire's control). She sends in Hellsing's most powerful operative, Alucard. Alucard comes upon the vampire as he is about to murder the last survivor of the police forces, Seras Victoria. In order to kill the vampire he shoots through Seras, mortally wounding her, but before he does so offers her the choice of dying a human or becoming a vampire.
They mainly fight vampires who are artifically created using a chip that is implanted in a living person. It is called a Freak Chip, and the resulting vampires are called Freaks. One trait of the Freak Chip is a pattern in the circuitry that looks like a swastika.
To create these copies the makers of the Freak Chip need a real Vampire; Incognito.
This story mainly follows the battle of the Hellsing organization against the Freaks.